How to reset when creating new video editing file?
When you start blender or create a new file, blender opens your startup.blend.

You can setup blender anyway you want and save the startup file and get the same contents each time you create a new file. You have managed to save your startup.blend after you added the ever present video track.

To set things up the way you want -


Start blender
Remove the VSE track (and any other items)
Go back to the screen layout you want to start with.
Use - File->Defaults->Save Startup File